﻿<!DOCTYPE html>
<html>
<head>
    <title>Facebook Login JavaScript Example</title>
    <meta charset="UTF-8">
</head>
<body>
    <script>
        // This is called with the results from from FB.getLoginStatus().
        function statusChangeCallback(response) {
            console.log('statusChangeCallback');
            console.log(response);
            // The response object is returned with a status field that lets the
            // app know the current login status of the person.
            // Full docs on the response object can be found in the documentation
            // for FB.getLoginStatus().
            if (response.status === 'connected') {
                // Logged into your app and Facebook.
                testAPI();
            } else if (response.status === 'not_authorized') {
                // The person is logged into Facebook, but not your app.
                document.getElementById('status').innerHTML = 'Please log ' +
                  'into this app.';
            } else {
                // The person is not logged into Facebook, so we're not sure if
                // they are logged into this app or not.
                document.getElementById('status').innerHTML = 'Please log ' +
                  'into Facebook.';
            }
        }

        // This function is called when someone finishes with the Login
        // Button.  See the onlogin handler attached to it in the sample
        // code below.
        function checkLoginState() {
            FB.getLoginStatus(function (response) {
                statusChangeCallback(response);
            });
        }

        window.fbAsyncInit = function () {
            FB.init({
                appId: '1683678291851321',
                cookie: true,  // enable cookies to allow the server to access
                // the session
                xfbml: true,  // parse social plugins on this page
                version: 'v2.5' // use version 2.2
            });

            // Now that we've initialized the JavaScript SDK, we call
            // FB.getLoginStatus().  This function gets the state of the
            // person visiting this page and can return one of three states to
            // the callback you provide.  They can be:
            //
            // 1. Logged into your app ('connected')
            // 2. Logged into Facebook, but not your app ('not_authorized')
            // 3. Not logged into Facebook and can't tell if they are logged into
            //    your app or not.
            //
            // These three cases are handled in the callback function.

            FB.getLoginStatus(function (response) {
                statusChangeCallback(response);
            });

        };

        // Load the SDK asynchronously
        (function (d, s, id) {
            var js, fjs = d.getElementsByTagName(s)[0];
            if (d.getElementById(id)) return;
            js = d.createElement(s); js.id = id;
            js.src = "//connect.facebook.net/en_US/sdk.js";
            fjs.parentNode.insertBefore(js, fjs);
        }(document, 'script', 'facebook-jssdk'));

        // Here we run a very simple test of the Graph API after login is
        // successful.  See statusChangeCallback() for when this call is made.
        function testAPI() {
            console.log('Welcome!  Fetching your information.... ');
            FB.api('/me', function (response) {
                console.log('Successful login for: ' + response.name);
                document.getElementById('status').innerHTML =
                  'Thanks for logging in, ' + response.name + '!';
            });
        }
    </script>
    <!--
      Below we include the Login Button social plugin. This button uses
      the JavaScript SDK to present a graphical Login button that triggers
      the FB.login() function when clicked.
    -->

    <fb:login-button scope="public_profile,email" onlogin="checkLoginState();">
    </fb:login-button>

<div id="status">
    </div>

</body>
</html>
